1. You should use indefinite pronouns that refer to people or things without saying exactly who or what they are. We use pronouns ending in -body or -one for people, and pronouns ending in -thing for things:

Everybody enjoyed this performance.

He opened the door but there was no one at home.

2. Use a singular verb after an indefinite pronoun:

Everybody loves tasty dishes.

Everything was ready for the concert.

3. When we refer back to an indefinite pronoun we normally use a plural pronoun:

Everybody enjoyed the concert. They stood up and clapped.

4. You can add -'s to an indefinite pronoun to make a possessive.

They were staying in somebody’s house.

5. You must not use another negative in a clause with nobody, no one or nothing:

Nobody came in.

6. You can use elseafter indefinite pronouns to refer to people or things in addition to the ones we already mentioned.